w83977atg Winbond Electronics Corp America, w83977atg Datasheet - Page 111

• Manufacturer Part Number: w83977atg
• Description: W83877tf Plus Kbc, Gp I/o, Wake-up, Fir, Cir, Pb-free
• Manufacturer: Winbond Electronics Corp America

W83977ATF/W83977ATG
10. GENERAL PURPOSE I/O
W83977ATF/ATG provides 23 Input/Output ports that can be individually configured to perform a
simple basic I/O function or a pre-defined alternate function. These 23 GP I/O ports are divided into
three groups; the first group contains 8 ports, the second group contains only 7 ports, and the third
group contains 8 ports. Each port in the first group corresponds to a configuration register in logical
device 7, the second group in logical device 8, and the third group in logical device 9. Users can
select these I/O ports functions by independently programming the configuration registers. Figure 7.1,
7.2, and 7.3 show the GP I/O port's structure of logical device 7, 8, and 9 respectively. Right after
Power-on reset, those ports default to perform basic I/O functions.
Figure 10.1
Publication Release Date: May 2006
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Revision 0.6